Filling end parting and clamping mechanism



Feb. 15, 1955 w. E. LUNDGREN FILLING END PARTING AND CLAMF'ING MECHANISM Filed Jan. 26, 1955 2 Sheets-Sheet 1 WILLIAM E LUNDGREN ATTORNEYS 1955 w. E. LUNDGREN FILLING END PARTING AND CLAMPING MECHANISM 2 Sheets-Sheet 2 Filed Jan. 26, 1953 INVENTOR. WILLIAM E. LUNDGREN X 3W lm-rym ATTORNEYS United States Patent FILLING END PARTING AND CLAMPING MECHANISM William E. Lundgren, Sharon, Mass., asslgnor to The Ballard Clark Company, Danielson, Conn a corporation of Connecticut Application January 26, 1953, Serial No. 333,246

7 Claims. (Cl. 139-263) This invention relates to improved filling and parting and clamping mechanism for looms and more particularly to a relatively simpler and lighter mechanism of this nature.

Whereas mechanism of this nature, as in my Patent 2,093,696, has commonly employed complex moving parts for effecting the thread parting and clamping movements of the operating jaws, my present invention eliminates such moving parts and effects the jaw movement by relatively simple elements disposed to engage certain abutments provided for the purpose. Also, whereas prior known mechanisms have employed thread parting and clamping jaws disposed a substantial distance laterally of the supporting guide therefor, thereby rendering the mechanism complex and cumbersome and adversely affecting its operation, my invention disposes such jaws forwardly of and substantially in alignment with the guide, thereby greatly simplifying the mechanism and facilitating its smooth and unbiased operation. The production of a new and improved mechanism embodying these and other novel features hereinafter described comprises a further object of the invention.

These and other features of the invention will be best understood and appreciated from the following description of a preferred embodiment thereof selected for purposes of illustration and shown in the accompanying drawing in which- Fig. l is a side elevation of my thread parting and clamping mechanism in forwardly extended position,

Fig. 2 is a like view with the parts moved to the parting and clamping position,

Fig. 3 illustrates the mechanism in retracted position,

Fig. 4 is an enlarged fragmentary plan view of Fig. 3,

Fig. 5 is a sectional view taken on line 55 of Fig. 4,

Fig. 6 is an exploded view of the thread parting and clamping parts,

Fig. 7 is a perspective view of the parts in assembled relation,

Fig. 8 is a sectional view taken on line 8-8 of Fig. l, and

Fig. 9 is a sectional view taken on line 99 of Fig. 2.

The end parting and clamping parts of the improved mechanism are carried on the forward end of a carrier bar 10 mounted for longitudinal movement in a supporting guide 12 and held therein by a cover plate 14 secured to my guide by screws 15. The guide is supported in a bracket 16 mounted on the loom and clamped to the guide by screws 18. The plate 14 is slotted at 20 to accommodate a stud 22 fixed to the carrier, a slotted arm similar to that shown in my said patent being provided for engaging the pin and reciprocating the carrier longitudinally in the guide.

A fixed jaw 24 is integral with and projects forwardly from the forward end of the carrier. Two pivotally movable jaws 26 and 28 cooperate with the fixed jaws 24 and are mounted on a pivot bolt 30 extending through a hole 32 in the carrier. A lock nut 34 threaded to the bolt together with a spring washer 36 serve to maintain the parts in the assembled relation shown in Fig. 7.

The jaw 26 has an upwardly extending portion 38 providing an abutment hereinafter described. An arm 40 fixed to this abutment by screws 42 has a straight edge in contact with a straight marginal portion 44 of the bolt head 45 whereby the jaw 26 and bolt 30 rotate as a unit. The bolt is also provided with a rectangular portion 46 for engaging within the rectangular hole 48 of the gripper 2,702,055 Patented Feb. 15, 1955 blade 28, thereby causing the jaws 26 and 28 to rotate with the bolt as a unit. The blades 24 and 26 have coopcrating shearing edges and as illustrated in Fig. 4 the lower screw 42 is threaded through and projects beyond the jaw 26 to a position holding the blades 24 and 26 slightly inclined from parallel relation with the blades slightly spaced apart at the pivot axis and their shearing edges in shearing contact at the forward ends of the blades.

The free end of the arm 40 is beveled at 50 to cooperate with the bevel 52 on a stud 54, and relatively yielding means, such as the mounting of the stud on the free end of a leaf spring 56, is provided to permit rearward passage of the arm over the stud. A screw 58 secures the leaf spring to the guide 12 and a recess 60 in the guide rearwardly of the spring and stud permits depressing of the stud into the recess upon rearward movement of the carrier from the position of Fig. 2 to that of Fig. 3, thus permitting the arm 40 to pass rearwardly over the stud. Upon movement of the carrier from Fig. 3 to Fig. l, the marginal cam portion 62 of the arm is adapted to engage the stud 54 and move the arm to the open blade position of Fig. l. The mounting of the blade opening stud 54 on the guide 12 is of primary importance since with such mounting the stud always remains in proper operating position relative to the arm 40 regardless of adjustments required and made properly and relatively to position the end parting mechanism and the shuttle box.

The filling replenishing mechanism is idle during the normal operation of the loom. Upon call for filling replenishing, the carrier 10 is moved forwardly to the position of Fig. 1 by mechanism operating on the stud 22 as disclosed in my said patent. During this movement the cam 62 engages the stud 54 and opens the jaws as indicated in Fig. l, a shoulder 63 on the jaw 26 serving as a limit stop to this movement. In this position the jaws are disposed within the shuttle box 64 and in open position to receive the outgoing filling end 68, and the abutment 38 is in opposed relation to the abutment 66 on the shuttle box. When the bobbin transfer takes place the shuttle 70 contacts and drives the shuttle box 64 rearwardly against the abutment 38 as shown in Fig. 2 whereupon the jaws are closed, the thread severed and the end 72 gripped between the jaws 24 and 28. The cutter now returns to the idle position of Fig. 3 by means of the said slotted arm or other mechanism employed for performing this function.

The jaw of blade 24 is preferably integral and disposed in longitudinal alignment with the carrier bar 10 and the disposing of the jaws forwardly from the forward end of the carrier bar substantially in longitudinal alignment with the carrier bar and the bar supporting and guiding channel in the member 12 not only renders the mechanism extremely simple and economical but also substantially facilitates its easy and unbiased operation. Such mechanism and operation include the abutment 54 on and projecting outwardly from one face of the guide member 12 and the arm 40 carried by and extending rearwardly from the pivoted blade 26 in position to engage the abutment 54 and open the pivoted blade upon forward movement of the carrier bar 10. Thus the mechanism is simple and compact and operates smoothly and without bias.

Having thus disclosed my invention what I claim as new and desire to secure by Letters Patent is:

1. In a weft replenishing loom, the combination of a bracket supporting a guide channel, a carrier bar mounted for longitudinal sliding movement forwardly and rearwardly in said channel and projecting forwardly therefrom, a relatively fixed blade carried by and extending forwardly from the forward end of the carrier bar substantially in longitudinal alignment with the carrier bar and said channel, a forwardly extending blade pivoted to the carrier bar and cooperating with the fixed blade to form a weft thread cutter, cooperating means carried by the pivoted blade and bracket for moving the pivoted blade to open position during forward movement of the carrier bar, and means including an abutment carried by the pivoted blade for moving the pivoted blade to closed position while disposed at the forward travel end of the carrier bar.

2. The combination defined in claim 1 in which the fixed blade is integral with the carrier bar and disposed in longitudinal alignment therewith.

3. The combination defined in claim 1 in which said coo crating arm comprises an arm fixed to the pivoted bla e and extending rearwardly therefrom and an abutment carried by the bracket in the path of forward movement of the arm.

4. The combination defined in claim 3 in which said arm includes a cam thereon for engaging the last named abutment and moving the pivoted blade to open position upon forward movement of the carrier bar, said cooperating means including resilient means permitting relative yielding of the arm and abutment to permit rearward passage of the arm over the abutment.

5. The combination defined in claim 1 in which said guide channel is disposed in and extends longitudinally through a relatively long guide member supported by the bracket, and said cooperating means includes an abutment on and projecting outwardly from one face of the guide member and an arm carried by and extending rewardly from the pivoted blade in position to engage the last named abutment and open the pivoted blade upon forward movement of the carrier bar.

6. The combination defined in claim 1 in which said abutment is disposed laterally of and above the blade pivot axis for engagement by a cooperative abutment on the loom to close the pivoted blade while disposed at the forward travel end of the bar.

7. The combination defined in claim 1 in which said pivoted blade is disposed at one side of the fixed blade, a second pivoted blade pivoted to the carrier bar at the other side of and cooperating with the fixed blade, and a pivot bolt extending rot-atably through the bar and nonrotatably carrying both pivoted blades.

References Cited in the file of this patent UNITED STATES PATENTS 865,918 Ladd Sept. 10, 1907 1,279,412 Northrup Sept. 17, 1918 2,093,696 Lundgren Sept. 21, 1937 2,223,896 Nichols Dec. 3, 1940 

